#include <math.h>
#include <iostream>

using namespace std;

class number {
	float x;
public:
	number(float);
	float seno() {
		return (sin(x));
	}
};

number::number(float f) {
	x = f;
}

class sinusoide {
public:
	float valore(float theta) {
		return (sin(theta));
	}
};

int main() {

	number numbero(3.12);
	cout << numbero.seno() << endl;
	sinusoide sen;
	cout << sen.valore(3.12) << endl;

	return 0;
}
